Two-Fold Four-Wheel Golf Bag Cart Folding Device

ABSTRACT

A two-fold four-wheel golf bag cart folding device comprises: a lower cart frame; an upper cart frame; a rear wheel stand; a pull rod; a front wheel set; a locking mechanism, installed between an upper end of the upper cart frame and a lower end of the handle module, and having a function of fixing an angle between the upper cart frame and the handle module; and a four-link-rod mechanism, installed among the handle module, the rear wheel stand and the pull rod. The front wheels can be closed in synchronously while rear wheels are being folded, and the four wheels touch the ground simultaneously.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a two-fold four-wheel golf bag cart folding device, in particularly to a device capable of pushing rear wheels towards front wheels to touch the ground simultaneously when a golf bag cart is folded, so as to skip additional steps of folding the front wheels and removing a golf bag. The invention not only prevents staining users and facilitates users to carry and move the golf cart, so that the golf bag and cart can be stored together to achieve the effect of a simple and convenient operation.

2. Description of the Related Art

With reference to FIGS. 1 to 3 for a conventional two-fold three-wheel golf bag cart, a handlebar of the golf bag cart can be folded downward without the need of removing a golf bag A, but the golf bag cart will fall backward, so that it is necessary to fold the front wheels before folding the whole golf bag cart in order to keep the cart standing. Therefore, a user has to bend or squat to fold (remove) the front wheels, not only causing complicated and inconvenient operations and poor postures, but also staining the user's body or clothes easily. Obviously, this conventional golf bag cart requires improvements.

With reference to FIGS. 4 and 5 for another conventional two-fold three-wheel golf bag cart, a handlebar of the golf bag cart can be folded downward without the need of removing a golf bag A, and the folded golf bag cart can stand without the need of folding the front wheel, but the area of the bottom of the three-wheel golf bag cart is smaller than the four-wheel golf bag cart, so that the cart body may topple over easily when moving on a slope, and the weight of the golf bag at the front will press a lower supporting base against the ground and the golf bag cart stands after the golf bag cart is folded. As a result, the front and rear wheels cannot be used to push the golf bag cart by users. Obviously, this conventional golf bag cart also requires improvements.

SUMMARY OF THE INVENTION

Therefore, it is a primary objective of the present invention to provide a two-fold four-wheel golf bag cart folding device with a simple and convenient operation, particularly a golf bag cart capable of synchronously closing in the front wheels while folding the rear wheels, and the four wheels can touch the ground simultaneously to skip the step of folding the front wheels and removing the golf bag. The invention not only prevents staining the user, but also facilitates the user to carry and move the golf bag cart, and store both golf bag and cart altogether.

To achieve the foregoing objective, the present invention comprises: a lower cart frame, having a connecting plate installed at an upper end of the lower cart frame, and a lower supporting base disposed at a lower end of the lower cart frame; an upper cart frame, with a lower end coupled to the connecting plate, and having an upper supporting base and a handle module at an upper end, and the handle module being pivotally coupled to the upper supporting base such that the upper supporting base and the lower supporting base are fixed to the golf bag; a rear wheel stand, mounted on both sides of the connecting plate and having a rear wheel; a pull rod, with an end coupled to the handle module, and the other end coupled to the rear wheel stand; a front wheel set, having two front wheels installed on both sides of the lower supporting base respectively; a locking mechanism, installed between an upper end of the upper cart frame and a lower end of the handle module, and having a function of fixing an angle between the upper cart frame and the handle module; and a four-link-rod mechanism, installed among the handle module, the rear wheel stand and the pull rod. The front wheels can be closed in synchronously while the rear wheels are being folded, and the four wheels can touch the ground simultaneously to skip the step of folding the front wheels and removing the golf bag. The invention not only prevents staining the user, but also facilitates the user to carry and move the golf bag cart, and store both golf bag and cart altogether.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side view of a first conventional golf bag cart, when the cart is unfolded;

FIG. 2 is a side view of the first conventional golf bag cart when the cart is folded;

FIG. 3 is another side view of the first conventional golf bag cart when the cart is folded;

FIG. 4 is a side view of a second conventional golf bag cart when the cart is unfolded;

FIG. 5 is another side view of the second conventional golf bag cart when the cart is folded;

FIG. 6 is a perspective view of a golf bag cart of the present invention, when the cart is unfolded;

FIG. 7 is a side view of a golf bag cart of the present invention, when it is unfolded;

FIG. 8 is a cross-sectional view of a locking mechanism of the present invention, when it is unfolded;

FIG. 9 is a schematic view of a snap seat of a locking mechanism of the present invention;

FIG. 10 is a schematic view of a pull buckle of a locking mechanism of the present invention;

FIG. 11 is a schematic view of adjusting an angle of a handle module, when a golf bag cart of the present invention is unfolded;

FIG. 12 is another schematic view of adjusting an angle of a handle module, when a golf bag cart of the present invention is unfolded;

FIG. 13 is a cross-sectional view of a locking mechanism of the present invention locking mechanism, when the locking mechanism is released;

FIG. 14 is a side view of a golf bag cart of the present invention, when the cart is folded;

FIG. 15 is another side view of a golf bag cart of the present invention, when the cart is folded;

FIG. 16 is a schematic view of a four-link-rod mechanism of the present invention;

FIG. 17 is a perspective view of a folding and fixing mechanism of the present invention;

FIG. 18 is a cross-sectional view of a folding and fixing mechanism of the present invention; and

FIG. 19 is a cross-sectional view of snapping a folding and fixing mechanism of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

To make it easier for our examiner to understand the technical characteristics and measures of the present invention to achieve the aforementioned objects and effects, we use preferred embodiments with related drawings for the detailed description of the present invention as follows.

With reference to FIGS. 6 to 10 for a golf bag cart of the present invention, the gold bag cart comes with a bilaterally symmetric cart body, and only one side of the cart is described for simplicity.

The present invention comprises: a lower cart frame 1, having a connecting plate 11 installed at an upper end of the lower cart frame 1, and a lower supporting base 12 disposed at a lower end of the lower cart frame 1; an upper cart frame 2, with a lower end coupled to the connecting plate 11, and an upper end having an upper supporting base 21 and a handle module 20, and the handle module 20 being pivotally coupled to the upper supporting base 21; a rear wheel stand 3, mounted on both sides of the connecting plate 11 and having a rear wheel 31 fixed to a rear end of the rear wheel stand 3; a pull rod 4, with an end coupled to the handle module 20 and the other end coupled to the rear wheel stand 3 to produce a link between the handle module 20 and the rear wheel stand 3; a front wheel set, having two front wheels 5 installed on both sides of the lower supporting base 12 respectively; a locking mechanism 6, installed between the upper end of the upper cart frame 2 (or the upper supporting base 21) and the lower end of the handle module 20, and having: a snap seat 61, fixed at the lower end of the handle module 20, and having a plurality of snap slots 611, a push-pull surface 612 disposed at the front end of the snap slot 611; and a pull buckle 62, pivotally coupled to the upper end of the upper supporting base 21, an elastic element 63 such as a torque spring abutting against the rear end, and a long slot 64 formed at the front end for passing a snap rod 65 to latch with or separate from the snap slot 611; and a four-link-rod mechanism, as shown in FIG. 16, including: a first link rod 71 extending from a first shaft 711 to a second shaft 712 under the handle module 20, a second link rod 72 being a pull rod 4, a third link rod 73 extending from a first shaft 731 to a second shaft 732 of the rear wheel stand 3, and a fourth link rod extending from a first shaft 711 of the handle module 20 to a second shaft 732 of the rear wheel stand 3. With the design of the size of the four-link-rod mechanism, when the handle module 20 is turned downward and folded, the rear wheels 31 are folded synchronously to approach the front wheel 5 closely and touch the ground altogether, so as to achieve the effect of keeping the golf bag cart standing after the cart is folded.

The present invention further comprises a folding and fixing mechanism 8 as shown in FIGS. 17 to 19, and the folding and fixing mechanism 8 comprises: a snap hook 81 installed at a lower end of the handle module 20 and a snap block 80 disposed at an upper end of the upper cart frame 2, wherein the snap block 80 contains an elastic press button 82 installed therein, and the push button 82 further has an oblique surface 821 disposed opposite to an external side of the snap block 80 for snapping in the snap hook 81.

With the aforementioned structure and assembly, when the present invention is unfolded as shown in FIGS. 6 to 8, the golf bag A is fixed between the upper supporting base 21 and the lower supporting base 12, and the snap rod 65 of the locking mechanism 6 is snapped into the snap slot 611, such that the handle module 20 and the upper cart frame 2 are secured with one another. Now, the pull buckle 62 can be pressed to separate the snap rod 65 from the snap slot 611, while moving the handle module 20 (or the snap seat 61) to change the snapping position of the snap rod 65 and the snap slot 611 to achieve the effect of adjusting the inclination of the handle module 20 as shown in FIGS. 8, 11 and 12 to fit users of different heights.

If a user wants to fold the gold bag cart, the user releases the locking mechanism 6, and presses the pull buckle 62 to separate the snap rod 65 from the snap slot 611, and then turns the handle module 20 backward and rotates it downward, so that the pull rod 4 drives the rear wheel stand 3 to move forward and fold inward, and the rear wheels 31 and the front wheels 5 close in with each other to complete folding the golf bag cart as shown in FIGS. 13 to 15 without requiring the step of folding the front wheels 5, so that the operation is simple and easy, and users need not to remove the golf bag A before folding the golf bag cart, so as to keep the four wheels (including the two front wheels and the two rear wheels) to stand on the ground simultaneously after the golf bag cart is folded, and also facilitate the users to carry or move the golf bag cart.

In the aforementioned folding and unfolding operations, the handle module 20 is moved backward and folded downward at the same time, and the snap hook 81 is snapped into the snap block 80 to be fixed with the push button 82, and the handle module 20 and the upper cart frame 2 are latched and positioned to facilitate carrying or moving the golf bag cart, while preventing the cart from being unfolded accidentally.

On the other hand, if the user wants to unfold the golf bag cart, the user releases the folding and fixing mechanism 8 first by pressing the push button 82 to separate it from the snap hook 81 as shown in FIG. 19, and then the handle module 20 is moved upward and pulled forward, and the pull rod 4 drives the rear wheel stand 3 to move backward and unfold outward. In the meantime, the locking mechanism 6 automatically locks the handle module 20 with the upper cart frame 2. In other words, when the handle module 20 is moved upward and turned forward, the push-pull surface 612 at the front end of the snap seat 61 pushes the snap rod 65 to move along the long slot 64 as shown FIG. 13, and then the elastic force of the torque spring 63 snaps the snap rod 65 into the snap slot 611 to complete an automatic lock and resume the original unfolded state as shown in FIGS. 6 to 8.

In summation of the description above, the present invention improves over the prior art and at least has the following advantages and effects.

-   1. The folding can be completed by simply turning the handle module     20 downward. The invention can skip the additional step of folding     the front wheels again, not only providing a simple and convenient     operation, but also preventing staining the user's body or clothes. -   2. The four wheels keep standing on the ground after the golf bag     cart is folded, and the golf bag A stays on the cart to facilitate     users to carry the cart, or facilitate users to push the cart when     the golf bag is remained in the cart. -   3. The folding and fixing mechanism 8 can be used for latching and     positioning the upper cart frame 2 and the handle module 20 to     facilitate users to carry and move the golf bag cart. -   4. When the golf bag cart is unfolded, the locking mechanism 6 is     used to adjust the inclination of the handle module 20 to fit users     of different heights.

In summation, the invention improves over the prior art and complies with patent application requirements, and thus is filed for patent application. 

What is claimed is:
 1. A two-fold four-wheel golf bag cart folding device, comprising: a lower cart frame, having a connecting plate installed at an upper end of the lower cart frame, and a lower supporting base disposed at a lower end of the lower cart frame; an upper cart frame, with a lower end coupled to the connecting plate, and having an upper supporting base and a handle module at an upper end, such that the upper supporting base and the lower supporting base are fixed to the golf bag; a rear wheel stand, mounted on both sides of the connecting plate and having a rear wheel; a pull rod, with an end coupled to the handle module, and the other end coupled to the rear wheel stand; a front wheel set, having two front wheels installed on both sides of the lower supporting base respectively; a locking mechanism, installed between an upper end of the upper cart frame and a lower end of the handle module, and having a function of fixing an angle between the upper cart frame and the handle module; and a four-link-rod mechanism, installed among the handle module, the rear wheel stand and the pull rod.
 2. The two-fold four-wheel golf bag cart folding device of claim 1, wherein the four-link-rod mechanism comprises: a first link rod, extending from a first shaft to a second shaft of the handle module; a second link rod being a pull rod; a third link rod, extending from a third shaft to a fourth shaft of the rear wheel stand; and a fourth link rod, extending from the first shaft of the handle module to a fourth shaft of the rear wheel stand.
 3. The two-fold four-wheel golf bag cart folding device of claim 1, wherein the front and rear wheels touch the ground simultaneously, and the golf bag is attached onto the cart frames and remains erected without being toppled, when the upper and lower cart frames are folded. 